More about the attacks

Ms de Block said in a statement (in French) that the injured were from 40 nationalities, and 150 were still being treated in hospitals across Belgium.

Many are suffering from burns or wounds normally seen on a battlefield, such as shrapnel injuries. The death toll, the statement said, was still "provisional".

Ms de Block added that four patients were in a coma and had not yet been identified, which was delaying the process of naming victims.

Belgium's king and queen visited the airport on Wednesday and also met some of those injured in the attacks. A minute's silence was held at midday.

Federal Prosecutor Frederic Van Leeuw said Brahim el-Bakraoui had been identified as the middle of three suspects caught in a CCTV image at the airport.

Image copyrightReutersImage caption
The airport CCTV image. The man on the left has not been officially identified and is believed to have died. Brahim el-Bakraoui is in the middle and was also killed. The man on the right has not been identified and is on the run

The man on the left is believed to have died at the airport. The man on the right, wearing the hat, is thought to have fled the scene.

Mr Van Leeuw said the man in the hat had left a bag containing "the biggest bomb", which later partially exploded after police had evacuated the terminal, injuring no-one.

Reports in Belgian and French media suggest the man on the left is Najim Laachraoui, but this is not confirmed. Analysts say Laachraoui is believed to be a key bomb maker.

Mr Van Leeuw said a taxi driver had told police he had picked up the three men from an address in the Schaerbeek area of Brussels.

The apartment was raided later on Tuesday and bomb-making materials, including 15kg (33lb) of high explosive, were found.

A note from Brahim el-Bakraoui was found in a nearby rubbish bin. In it, he wrote: "I'm in a hurry (...) they're looking for me everywhere. I'm not safe any more. If I give myself up they'll put me in a cell."

Image copyrightReutersImage caption
World landmarks, including London's National Gallery, have displayed the Belgian flag in tribute to the victims

Mr Van Leeuw said the brothers, who were Belgian nationals, were known to police and had criminal records. They were identified by DNA records.

RTBF quoted a police source saying that Khalid el-Bakraoui had used a false name to rent a flat in the Forest area of Brussels where police killed a gunman in a shootout last week.

It was during that raid that detectives found a fingerprint of Salah Abdeslam, the main suspect in the Paris terror attacks of 13 November.